from The Century Dictionary and Cyclopedia

Etymologies

un- +‎ tidy (Wiktionary)

Examples

‘Please put away your toys,’ I said to Emilia as I dragged my pathetic self out of the room, tripping over the random dismembered doll parts and stray bits of crafting materials that she keeps in untidy piles throughout the house, ‘otherwise I’ll have to ask Daddy to throw it all away.’

"Early in the term the untidy, neglectful school yards were converted into gardens, farmers supplying the seed, and when no mule could be procured for ploughing, four boys were harnessed to draw the plough, while another guided it.

He would have told his Secretary of Defense that the spectacle of looters stripping government buildings down to their concrete skeletons wasn't the kind of untidy freedom the United States could tolerate.

Someone once described the Fabian Socialists as "more grieved by the world's mess than hurt by the world's wrongs," and indeed the Fabians often seemed to look upon England as a kind of untidy house which they wree to put in order.